Digital electronics Arduino 7C202421

What type of signal does a photoresistor sensor send when ambient light decreases?

• Digital signal

• Analog signal

• PWM signal

• Radiofrequency signal

What is the main function of an LED in a traffic signaling project?

• Control the speed of traffic.

• Indicate when to stop or go.

• Measure the distance between vehicles.

• Regulate ambient temperature.

Which of the following situations represents an example of an analog signal in everyday life?

• Turning a light switch on or off.

• Pressing a button to start a game on a video game console.

• Changing the TV channel with a remote control.

• Adjusting the radio volume by turning a dial.

What makes a servomotor rotate to a specific angle?

• Digital signals.

• PWM signals.

• Analog signals.

• Radiofrequency signals.

Which of the following statements best describes an analog signal?

• It is a signal that can only take values 0 or 1.

• It is a signal that can take any value such as 0,3 or 1,8

• It is a signal that can only represent integers.

• It is a signal that cannot be processed by a microcontroller.

Which of the following statements best describes the purpose of code analysis in Arduino?

• Determine the physical length of the code.

• Check the quality of the wiring.

• Find errors or improvements in the code.

• Measure the efficiency of the hardware used.

Which of the following components is commonly used to measure light in an Arduino project?

• Ultrasonic sensor.

• Photoresistor.

• Potentiometer.

• Servomotor.

What is the main function of a photoresistor in an automatic lighting project?

• Regulate the environment's temperature.

• Detect the presence of nearby objects to change the light.

• Adjust the brightness of the lights according to ambient light.

• Measure soil humidity.

Which of the following options best describes an analog signal?

• Comprised of discrete values.

• Can take any value within a continuous range.

• Can only be on/off.

• Represents digital data.

How is the position of a servomotor controlled using Arduino?

• By changing the frequency of the signal.

• By varying the intensity of the current.

• By directly connecting to the power pins.

• By sending PWM pulses.